TY - JOUR

T1 - Highly textured 3D-printed translucent alumina through pressure-assisted sintering

AU - Nečina, Vojtěch

AU - Hofer, Anna-Katharina

AU - Bermejo, Raul

AU - Pabst, Willi

N1 - Publisher Copyright: © 2023 The Authors

PY - 2023/10/12

Y1 - 2023/10/12

N2 - Templated grain growth is a promising method for the fabrication of translucent alumina ceramics and a possible way to circumvent light scattering due to birefringence. In the present paper the effect of temperature, heating rate and dwell time on grain size, orientation, hardness and in-line transmittance is investigated on 3D-printed textured alumina. The samples were prepared by lithography-based ceramic manufacturing (LCM) of suspensions with fine-grained alumina, seeded by high aspect ratio templates and sintered by spark plasma sintering (SPS). A fully developed textured microstructure was achieved at 1600 °C for 1 h, whereas sufficient in-line transmittance of 54.6 % at 550 nm was achieved at 1700 °C for 3 h, albeit at the cost of considerable grain growth and loss of microstructural texturing.

AB - Templated grain growth is a promising method for the fabrication of translucent alumina ceramics and a possible way to circumvent light scattering due to birefringence. In the present paper the effect of temperature, heating rate and dwell time on grain size, orientation, hardness and in-line transmittance is investigated on 3D-printed textured alumina. The samples were prepared by lithography-based ceramic manufacturing (LCM) of suspensions with fine-grained alumina, seeded by high aspect ratio templates and sintered by spark plasma sintering (SPS). A fully developed textured microstructure was achieved at 1600 °C for 1 h, whereas sufficient in-line transmittance of 54.6 % at 550 nm was achieved at 1700 °C for 3 h, albeit at the cost of considerable grain growth and loss of microstructural texturing.

UR - https://pureadmin.unileoben.ac.at/portal/en/publications/highly-textured-3dprinted-translucent-alumina-through-pressureassisted-sintering(c5ca693a-ddcd-4bae-a40b-5d004e3677d0).html

U2 - 10.1016/j.oceram.2023.100487

DO - 10.1016/j.oceram.2023.100487

M3 - Article

VL - 16.2023

JO - Open ceramics

JF - Open ceramics

SN - 2666-5395

IS - December

M1 - 100487

ER -